mirror of
https://github.com/osm-search/Nominatim.git
synced 2024-10-27 19:48:44 +03:00
bef300305e
The new function is also used, when a country us updated. All SQL function related to country names have been removed.
288 lines
10 KiB
Python
288 lines
10 KiB
Python
"""
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Functions for setting up and importing a new Nominatim database.
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"""
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import logging
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import os
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import selectors
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import subprocess
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from pathlib import Path
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import psutil
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import psycopg2.extras
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from nominatim.db.connection import connect, get_pg_env
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from nominatim.db import utils as db_utils
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from nominatim.db.async_connection import DBConnection
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from nominatim.db.sql_preprocessor import SQLPreprocessor
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from nominatim.tools.exec_utils import run_osm2pgsql
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from nominatim.errors import UsageError
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from nominatim.version import POSTGRESQL_REQUIRED_VERSION, POSTGIS_REQUIRED_VERSION
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LOG = logging.getLogger()
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def setup_database_skeleton(dsn, data_dir, no_partitions, rouser=None):
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""" Create a new database for Nominatim and populate it with the
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essential extensions and data.
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"""
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LOG.warning('Creating database')
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create_db(dsn, rouser)
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LOG.warning('Setting up database')
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with connect(dsn) as conn:
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setup_extensions(conn)
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LOG.warning('Loading basic data')
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import_base_data(dsn, data_dir, no_partitions)
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def create_db(dsn, rouser=None):
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""" Create a new database for the given DSN. Fails when the database
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already exists or the PostgreSQL version is too old.
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Uses `createdb` to create the database.
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If 'rouser' is given, then the function also checks that the user
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with that given name exists.
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Requires superuser rights by the caller.
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"""
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proc = subprocess.run(['createdb'], env=get_pg_env(dsn), check=False)
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if proc.returncode != 0:
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raise UsageError('Creating new database failed.')
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with connect(dsn) as conn:
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postgres_version = conn.server_version_tuple()
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if postgres_version < POSTGRESQL_REQUIRED_VERSION:
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LOG.fatal('Minimum supported version of Postgresql is %d.%d. '
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'Found version %d.%d.',
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POSTGRESQL_REQUIRED_VERSION[0], POSTGRESQL_REQUIRED_VERSION[1],
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postgres_version[0], postgres_version[1])
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raise UsageError('PostgreSQL server is too old.')
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if rouser is not None:
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with conn.cursor() as cur:
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cnt = cur.scalar('SELECT count(*) FROM pg_user where usename = %s',
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(rouser, ))
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if cnt == 0:
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LOG.fatal("Web user '%s' does not exists. Create it with:\n"
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"\n createuser %s", rouser, rouser)
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raise UsageError('Missing read-only user.')
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def setup_extensions(conn):
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""" Set up all extensions needed for Nominatim. Also checks that the
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versions of the extensions are sufficient.
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"""
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with conn.cursor() as cur:
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cur.execute('CREATE EXTENSION IF NOT EXISTS hstore')
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cur.execute('CREATE EXTENSION IF NOT EXISTS postgis')
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conn.commit()
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postgis_version = conn.postgis_version_tuple()
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if postgis_version < POSTGIS_REQUIRED_VERSION:
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LOG.fatal('Minimum supported version of PostGIS is %d.%d. '
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'Found version %d.%d.',
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POSTGIS_REQUIRED_VERSION[0], POSTGIS_REQUIRED_VERSION[1],
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postgis_version[0], postgis_version[1])
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raise UsageError('PostGIS version is too old.')
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def import_base_data(dsn, sql_dir, ignore_partitions=False):
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""" Create and populate the tables with basic static data that provides
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the background for geocoding. Data is assumed to not yet exist.
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"""
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db_utils.execute_file(dsn, sql_dir / 'country_name.sql')
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db_utils.execute_file(dsn, sql_dir / 'country_osm_grid.sql.gz')
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if ignore_partitions:
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with connect(dsn) as conn:
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with conn.cursor() as cur:
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cur.execute('UPDATE country_name SET partition = 0')
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conn.commit()
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def import_osm_data(osm_file, options, drop=False, ignore_errors=False):
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""" Import the given OSM file. 'options' contains the list of
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default settings for osm2pgsql.
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"""
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options['import_file'] = osm_file
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options['append'] = False
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options['threads'] = 1
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if not options['flatnode_file'] and options['osm2pgsql_cache'] == 0:
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# Make some educated guesses about cache size based on the size
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# of the import file and the available memory.
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mem = psutil.virtual_memory()
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fsize = os.stat(str(osm_file)).st_size
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options['osm2pgsql_cache'] = int(min((mem.available + mem.cached) * 0.75,
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fsize * 2) / 1024 / 1024) + 1
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run_osm2pgsql(options)
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with connect(options['dsn']) as conn:
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if not ignore_errors:
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with conn.cursor() as cur:
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cur.execute('SELECT * FROM place LIMIT 1')
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if cur.rowcount == 0:
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raise UsageError('No data imported by osm2pgsql.')
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if drop:
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conn.drop_table('planet_osm_nodes')
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if drop:
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if options['flatnode_file']:
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Path(options['flatnode_file']).unlink()
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def create_tables(conn, config, reverse_only=False):
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""" Create the set of basic tables.
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When `reverse_only` is True, then the main table for searching will
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be skipped and only reverse search is possible.
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"""
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sql = SQLPreprocessor(conn, config)
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sql.env.globals['db']['reverse_only'] = reverse_only
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sql.run_sql_file(conn, 'tables.sql')
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def create_table_triggers(conn, config):
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""" Create the triggers for the tables. The trigger functions must already
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have been imported with refresh.create_functions().
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"""
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sql = SQLPreprocessor(conn, config)
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sql.run_sql_file(conn, 'table-triggers.sql')
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def create_partition_tables(conn, config):
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""" Create tables that have explicit partitioning.
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"""
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sql = SQLPreprocessor(conn, config)
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sql.run_sql_file(conn, 'partition-tables.src.sql')
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def truncate_data_tables(conn):
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""" Truncate all data tables to prepare for a fresh load.
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"""
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with conn.cursor() as cur:
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cur.execute('TRUNCATE placex')
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cur.execute('TRUNCATE place_addressline')
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cur.execute('TRUNCATE location_area')
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cur.execute('TRUNCATE location_area_country')
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cur.execute('TRUNCATE location_property_tiger')
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cur.execute('TRUNCATE location_property_osmline')
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cur.execute('TRUNCATE location_postcode')
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if conn.table_exists('search_name'):
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cur.execute('TRUNCATE search_name')
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cur.execute('DROP SEQUENCE IF EXISTS seq_place')
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cur.execute('CREATE SEQUENCE seq_place start 100000')
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cur.execute("""SELECT tablename FROM pg_tables
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WHERE tablename LIKE 'location_road_%'""")
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for table in [r[0] for r in list(cur)]:
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cur.execute('TRUNCATE ' + table)
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conn.commit()
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_COPY_COLUMNS = 'osm_type, osm_id, class, type, name, admin_level, address, extratags, geometry'
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def load_data(dsn, threads):
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""" Copy data into the word and placex table.
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"""
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sel = selectors.DefaultSelector()
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# Then copy data from place to placex in <threads - 1> chunks.
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place_threads = max(1, threads - 1)
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for imod in range(place_threads):
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conn = DBConnection(dsn)
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conn.connect()
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conn.perform("""INSERT INTO placex ({0})
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SELECT {0} FROM place
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WHERE osm_id % {1} = {2}
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AND NOT (class='place' and type='houses')
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AND ST_IsValid(geometry)
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""".format(_COPY_COLUMNS, place_threads, imod))
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sel.register(conn, selectors.EVENT_READ, conn)
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# Address interpolations go into another table.
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conn = DBConnection(dsn)
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conn.connect()
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conn.perform("""INSERT INTO location_property_osmline (osm_id, address, linegeo)
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SELECT osm_id, address, geometry FROM place
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WHERE class='place' and type='houses' and osm_type='W'
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and ST_GeometryType(geometry) = 'ST_LineString'
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""")
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sel.register(conn, selectors.EVENT_READ, conn)
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# Now wait for all of them to finish.
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todo = place_threads + 1
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while todo > 0:
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for key, _ in sel.select(1):
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conn = key.data
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sel.unregister(conn)
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conn.wait()
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conn.close()
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todo -= 1
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print('.', end='', flush=True)
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print('\n')
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with connect(dsn) as conn:
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with conn.cursor() as cur:
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cur.execute('ANALYSE')
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def create_search_indices(conn, config, drop=False):
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""" Create tables that have explicit partitioning.
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"""
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# If index creation failed and left an index invalid, they need to be
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# cleaned out first, so that the script recreates them.
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with conn.cursor() as cur:
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cur.execute("""SELECT relname FROM pg_class, pg_index
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WHERE pg_index.indisvalid = false
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AND pg_index.indexrelid = pg_class.oid""")
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bad_indices = [row[0] for row in list(cur)]
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for idx in bad_indices:
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LOG.info("Drop invalid index %s.", idx)
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cur.execute('DROP INDEX "{}"'.format(idx))
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conn.commit()
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sql = SQLPreprocessor(conn, config)
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sql.run_sql_file(conn, 'indices.sql', drop=drop)
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def create_country_names(conn, tokenizer, languages=None):
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""" Add default country names to search index. `languages` is a comma-
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separated list of language codes as used in OSM. If `languages` is not
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empty then only name translations for the given languages are added
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to the index.
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"""
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if languages:
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languages = languages.split(',')
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def _include_key(key):
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return key == 'name' or \
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(key.startswith('name:') \
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and (not languages or key[5:] in languages))
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with conn.cursor() as cur:
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psycopg2.extras.register_hstore(cur)
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cur.execute("""SELECT country_code, name FROM country_name
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WHERE country_code is not null""")
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with tokenizer.name_analyzer() as analyzer:
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for code, name in cur:
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names = [code]
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if code == 'gb':
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names.append('UK')
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if code == 'us':
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names.append('United States')
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# country names (only in languages as provided)
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if name:
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names.extend((v for k, v in name.items() if _include_key(k)))
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analyzer.add_country_names(code, names)
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conn.commit()
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